package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
@Slf4j
public class UserServiceImpl implements UserService {

    //微信服务器接口地址
    public static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";

    @Autowired
    private WeChatProperties weChatProperties;

    @Autowired
    private UserMapper userMapper;

    /**
     * @param userLoginDTO
     * @return
     * 微信登录
     */
    public User wxLogin(UserLoginDTO userLoginDTO) {
       /* *//*微信用户登录：1、调用微信服务的接口服务，来获得当前微信用户的openid*//*
        Map<String, String> map = new HashMap<String, String>();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        //js_code是通过小程序给传过来的，封装在了userLoginDTO中
        map.put("js_code",userLoginDTO.getCode());
        map.put("grant_type","authorization_code");
        String json = HttpClientUtil.doGet(WX_LOGIN, map);//返回的是JSON数据包

        //将JSON解析出来openid
        JSONObject jsonObject = JSON.parseObject(json);
        String openid = jsonObject.getString("openid");
*/
        //上述代码抽离成一个方法
        String openid = getOpenid(userLoginDTO.getCode());

        /*2、判断openid是否为空，如果为空表示登录失败，抛出业务异常*/
        if (openid == null) {
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        /*3、不为空，合法微信用户，判断当前微信用户是否为新用户*/
        User user = userMapper.getByOpenid(openid);
        /*4、如果是新用户自动完成注册*/
        if (user == null) {
            user = User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.insert(user);
        }
        /*5、返回用户对象*/
        return user;
    }

    /*调用微信接口服务，获取微信用户的openid*/
    private String getOpenid(String code){
        Map<String, String> map = new HashMap<String, String>();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        //js_code是通过小程序给传过来的，封装在了userLoginDTO中
        map.put("js_code",code);
        map.put("grant_type","authorization_code");
        String json = HttpClientUtil.doGet(WX_LOGIN, map);//返回的是JSON数据包

        //将JSON解析出来openid
        JSONObject jsonObject = JSON.parseObject(json);
        String openid = jsonObject.getString("openid");
        return openid;
    }
}
